Unit 2

1. Organs that take in oxygen when we breathe. (肺)
5. A living thing that grows in the ground and makes its own food using sunlight. (植物)
7. The organ that pumps blood through the body. (心臓)
10. The part of a plant that grows underground and takes in water. (根)
13. Things you keep the same in an experiment to make it fair. (対照（制御変数）)
15. An organ where food is mixed and broken down. (胃)
16. A tube in plants that carries water or nutrients (like xylem or phloem). (導管・管（植物の管）)
18. The world around us, including air, water, and living things. (環境)
19. When small food particles go from the intestines into the blood. (吸収)
22. variable The thing you choose to change in an experiment. (独立変数)

1. Flat green parts of a plant that make food from sunlight. (葉)
2. The process of getting food to stay healthy and grow. (栄養)
3. dioxide A gas that animals breathe out and plants use to make food. (二酸化炭素)
4. Sweet substances that give energy to living things. (糖)
6. A smart guess about what you think will happen in an experiment. (仮説)
8. The red liquid that moves through the body and carries oxygen and food. (血液)
9. A gas in the air that people and animals need to breathe. (酸素)
11. To change from liquid to gas. (蒸発する)
12. The process where water evaporates from leaves and pulls more water up. (蒸散)
14. variable The thing you measure in an experiment. It changes because of what you change. (従属変数)
17. A long tube in the body where food is digested and absorbed. (腸)
20. The part of a plant that holds it up and carries water and nutrients. (茎)
21. The process of breaking down food in the body. (消化)
23. A muscle under the lungs that helps with breathing. (横隔膜)